Vasa's cake - like from a pastry shop

Components:
crust:
5 eggs
5 spoons of sugar
5 spoons of ground walnuts
1 spoon of flour
40 g of grated dark chocolate
filling:
6 egg yolks
125 g of sugar
200 g of ground walnuts
100 ml of milk
60 g of dark chocolate
150 g of butter
grated peel of one orange
noise:
6 egg whites
200 g of sugar
100 ml of water
Crust Topping:
juice of one orange
Frosting
100g of chocolate
3 tablespoons of oil
2 spoons of milk